1 /*
2  * Copyright (C) 2019 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.tv.twopanelsettings.slices;
18 
19 import android.app.slice.SliceManager;
20 import android.content.Context;
21 import android.net.Uri;
22 import android.util.ArrayMap;
23 
24 import com.android.tv.twopanelsettings.slices.PreferenceSliceLiveData.SliceLiveDataImpl;
25 
26 
27 /**
28  * Ensure the SliceLiveData with same uri is created only once across the activity.
29  */
30 public class ContextSingleton {
31     private static ContextSingleton sInstance;
32     private ArrayMap<Uri, SliceLiveDataImpl> mSliceMap;
33     private boolean mGivenFullSliceAccess;
34 
35     /**
36      * Get the instance.
37      */
getInstance()38     public static ContextSingleton getInstance() {
39         if (sInstance == null) {
40             sInstance = new ContextSingleton();
41         }
42         return sInstance;
43     }
44 
ContextSingleton()45     private ContextSingleton() {
46         mSliceMap = new ArrayMap<>();
47         mGivenFullSliceAccess = false;
48     }
49 
50     /**
51      * Get the corresponding SliceLiveData based on the uri.
52      */
getSliceLiveData(Context context, Uri uri)53     public SliceLiveDataImpl getSliceLiveData(Context context, Uri uri) {
54         if (!mSliceMap.containsKey(uri)) {
55             mSliceMap.put(uri, PreferenceSliceLiveData.fromUri(context, uri));
56         }
57 
58         return mSliceMap.get(uri);
59     }
60 
61     /**
62      *  Grant full access to current package.
63      */
grantFullAccess(Context ctx, Uri uri)64     public void grantFullAccess(Context ctx, Uri uri) {
65         if (!mGivenFullSliceAccess) {
66             String currentPackageName = ctx.getApplicationContext().getPackageName();
67             // Uri cannot be null here as SliceManagerService calls notifyChange(uri, null) in
68             // grantPermissionFromUser.
69             ctx.getSystemService(SliceManager.class).grantPermissionFromUser(
70                     uri, currentPackageName, true);
71             mGivenFullSliceAccess = true;
72         }
73     }
74 }
75